我在上一个问题的评论中问过这个问题,但我认为最好将它作为一个新的独立问题移至此处。
我试图弄清楚如何使用lgi DBus转换此Python代码以将dbus信号发送到Lua:
class DBUSTestInterface(object):
"""
Server_XML definition.
Emit / Publish a signal that is a random integer every second
type='i' for integer.
"""
dbus = """
<node>
<interface name="com.test.device.aaa">
<signal name="get">
<arg type='s'/>
<arg type='s'/>
<arg type='s'/>
<arg type='s'/>
<arg type='s'/>
<arg type='s'/>
<arg type='s'/>
<arg type='i'/>
</signal>
</interface>
</node>
"""
get = signal()
emit = DBUSTestInterface()
bus.publish("com.test.device.get", emit)
我怀疑(完全不确定)必须将其发送到自省界面的消息,类似于以下内容:
local object = "/org/freedesktop/DBus"
local interface = "org.freedesktop.DBus.Introspectable"
local method = "Introspect"
local message = Gio.DBusMessage.new_method_call(name, object, interface, method)
message:set_body(GLib.Variant("(aoo)", {{location},session})) -- How do I set the same message as above?
但是我不确定,我也不知道如何使用在Python中工作的XML设置消息正文。
如果您可以提供一些示例或指出可以在哪里找到的示例,我将不胜感激!
谢谢!
答案 0 :(得分:1)
嘿,Google刚把我引到https://github.com/pavouk/lgi/issues/220的旁边。
以某种方式,我觉得您的代码示例不能按原样工作,也不是某些独立的python代码。因此,我将使用文本中的注释:
每秒发射/发布一个随机整数的信号
这样做的Lua代码(好吧,“随机整数”除外,除非您认为42
是随机的):
local lgi = require("lgi")
local Gio, GLib, GObject = lgi.Gio, lgi.GLib, lgi.GObject
local conn
GLib.timeout_add_seconds(GLib.PRIORITY_DEFAULT, 1, function()
if conn then
conn:emit_signal(nil, "/your/example/has/no/path",
"com.test.device.aaa", "get",
GLib.Variant("(sssssssi)", { "what", "are", "all",
"these", "strings", "for", "?", 42 }))
end
return true
end)
local function on_bus_acquire(con)
conn = con
local function arg(name, signature)
return Gio.DBusArgInfo{ name = name, signature = signature }
end
local interface_info = Gio.DBusInterfaceInfo {
name = "com.test.device.aaa",
signals = {
Gio.DBusSignalInfo{
name = "get",
args = {
arg("no_name?!?", "s"),
arg("no_name?!?", "s"),
arg("no_name?!?", "s"),
arg("no_name?!?", "s"),
arg("no_name?!?", "s"),
arg("no_name?!?", "s"),
arg("no_name?!?", "s"),
arg("no_name?!?", "i")
}
}
}
}
conn:register_object("/your/example/has/no/path", interface_info, nil)
end
Gio.bus_own_name(Gio.BusType.SESSION, "com.test.device.get", Gio.BusNameOwnerFlags.NONE,
GObject.Closure(on_bus_acquire), nil, nil)
GLib.MainLoop.new():run()